Engineered for the most demanding athletes in the toughest conditions, the men's Artilect Darkhorse 185 Zoned base layer top get you in the zone with lightweight and durable merino wool.

Underwear TopsBase Layer Tops

Whether you layer it or wear it on its own, the Obermeyer Discover base layer crew top offers a flatseam construction for comfort, a soft brushed interior and fun one-of-a-kind colors and prints.

Underwear TopsBase Layer Tops

Whether you're carving through the snow or walking through town, the women's Obermeyer is an ultra-light base layer designed to move with your body, excelling in any conditions, on any mountain.

Underwear TopsBase Layer Tops

Thanks to its merino wool fabrication and flatlock construction, the Kari Traa Elenore women's long-sleeve base layer top feels cozy and comfy next to the skin, no matter the activity.

Underwear TopsBase Layer Tops

You can stop looking for that ideal base layer. The tasc Performance Elevation Merino men's T-shirt offers superior temperature regulation and moisture management without the bulk.

Underwear TopsBase Layer Tops

Look no further for that perfect base layer. The women's tasc Performance Elevation Merino T-shirt offers superior temperature regulation and moisture management without the bulk.

Underwear TopsBase Layer Tops

Let it snow! The women's Kari Traa Else Half-Zip base layer top blends soft merino wool and modern fabric mapping to keep you warm and comfortable on or off the slopes.

Underwear TopsBase Layer Tops

With the same silhouette as the original but in a lighter-weight blend, the women's Wild Rye Evie Lite Raglan base layer top will keep you warm (but not too warm) from spring skiing to summer camping.

Underwear TopsBase Layer Tops

Made with 100% merino wool, the Wild Rye Evie raglan base layer top offers a looser, contemporary fit and longer silhouette that work to keep you comfortable on the skin track or chairlift.

Underwear TopsBase Layer Tops

Purpose-built for advanced insulation and unrestricted mobility, the men's NRS Expedition Weight base layer shirt layers seamlessly under drysuits, helping paddlers hit the water in cold conditions.

Underwear TopsBase Layer Tops

As solid and dependable as its namesake rock formation in Colorado, the men's Artilect Flatiron 185 crew is durable yet comfortable and made for effortless, reliable performance in harsh conditions.

Underwear TopsBase Layer Tops

Named for the rock formation in Boulder, the women's Artilect Flatiron 185 base layer crew top is a great companion for getting vert or counting off switchbacks. It's soft, breathable and warm.

Underwear TopsBase Layer Tops

Offering up personalized comfort, the men's Artilect Flatiron 185 Quarter-Zip base layer top gives you warm, fast-drying wool and a zipper that lets you vent or add heat to your core.

Underwear TopsBase Layer Tops

Providing warmth, natural odor resistance and breathability for cold-weather activities, the Kari Traa Floke base layer top blends fine merino wool with tech fibers for a soft, medium-weight fabric.

Underwear TopsBase Layer Tops